Charging error 120 indicates a battery fault has been detected.
Confirm that you are using an authentic iRobot® Lithium-Ion battery. Unknown charging errors can occur with aftermarket purchased batteries.
Remove and re-install your battery to resolve the issue.
If the error persists, contact iRobot Customer Care for additional assistance.
For expedited service, please have the following ready:
- Your robot charged and with you
- Your robot's Serial number
- For warranty claims: Proof of purchase (receipt or invoice for purchase)
